Calculate bmRequestType for USB
i.e.
- http:https://www.usbmadesimple.co.uk/ums_4.htm
- https://www.usb.org/sites/default/files/csm2_v1_0.pdf
- https://www.beyondlogic.org/usbnutshell/usb6.shtml
Useful combined with e.g. node-usb.
npm i bmrequesttypeconst { bmRequestType, DIRECTION, TYPE, RECIPIENT } = require('bmrequesttype');
bmRequestType(DIRECTION.Out, TYPE.Class, RECIPIENT.Interface); // 33bmRequestType(direction, type, recipient)
DIRECTION.Out = 0
DIRECTION.In = 1
TYPE.Standard = 0
TYPE.Class = 1
TYPE.Vendor = 2
TYPE.Reserved = 3
RECIPIENT.Device = 0
RECIPIENT.Interface = 1
RECIPIENT.Endpoint = 2
RECIPIENT.Other = 3